Functional dyspepsia (FD) is a condition that can include pain above your belly button, bloating, and nausea (often without vomiting).This disorder has also been called “nonulcer dyspepsia” or “nervous stomach.” A feeling of fullness in the stomach can prevent people with functional dyspepsia from eating a normal meal.

https://www.uofmhealth.org/conditions-treatments/digestive-and-liver-health/irritable-bowel-syndrome-ibs-and-functional-bowel-disorders